Influence of axial coordination on the photophysical property of excited state of zinc porphyrin |
| |
Authors: | Email author" target="_blank">Feng?JuanEmail author Zhang?Huijuan Xiang?Junfeng Ai?Xicheng Zhang?Xingkang Xu?Guangzhi Zhang?Jianping |
| |
Institution: | 1. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Center for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China 2. Technique Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100081, China |
| |
Abstract: | Abstract The effect of axial ligand 4-N,N-dimethyl aminopyridine (DMAP) on the fluorescence property of the second singlet excited state (S2) and first singlet excited state (S1) of 5,10,15, 20-tetra(p-methoxyl)phenyl zinc porphyrin has been investigated using steady-state absorption, fluorescence spectroscopy and picosecond time-resolved fluorescence spectroscopy. Hot fluores-cence is clearly observed and is then reasonably assigned to the higher vibronic level from S1 state. A further analysis of fluorescence kinetics results shows that the coordination of DMAP to the zinc ion results in a decrease of hot fluorescence lifetime and an increase of the relative con-tent of hot fluorescence. Similar phenomenon was observed with respects to S1 fluorescence upon the addition of DMAP in toluene. For a complete understanding of such an effect, a possible mechanism has been put forward and discussed in detail. |
| |
Keywords: | time-resolved fluorescence spectroscopy axial ligand zinc porphyrin hot fluorescence |
本文献已被 CNKI 万方数据 SpringerLink 等数据库收录! |
|